Armstrong, Robert E. <br/><br/>
Fundamentals of direct current / 
Robert E. Armstrong. 
 - Blue Ridge Summit, PA :  Tab Books,  c1986. 
 - vii, 241 p. :  ill. 
<br/><br/><label>ISBN: </label>0830608702 :  $19.95 0830618708 (pbk.) :  $12.45 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric engineering.<br/>Electric currents, Direct.
<br/><br/><label>Dewey Class. No.: </label>621.319/12�19